Hot top for ingot molds



Aug. 11, 1931. w, H, HAWS 1,818,477

HOT TOP FORQINGOT MOLDS Fild Oct. 2, 1930 2 Sheets-Sheet l INVENTOR WJiHaw 1 BY I ATTORNEYS W. H. HAWS HOT TOP FOR INGOT MOLD S Filed Oct. 2, 1930 2 Sheets-Sheet 2 NTOR 42u- 9am ATTO RN EYS Patented Aug. 11, 1931 PATENT? OFFICE 'WILLIAH H.

EA'WS. OF .JOHNSTOW'N. PENNSYLVANIA, ASSIGNOR O1 ONE-ml '10 WILLIAM W. H OFFMAN, OF JOHNSTOWN, PENNSYLVANIA B01 TOP FOB INGO'I. HOLDS Application am October 2, mac. Serial in. 485,919.

This invention relates-to hot tops for ingot molds and, among other objects, aims to pro vide a removable hot top which may be used for a number of heats without renewal of any of its parts.

In the accompanying drawings showmg two embodiments of the invention,

Fig. 1 is a vertical section through the upper part of an ingot mold showingone form of hot top in position thereon; I

Fig. 2 is a side elevation of the hot top, showing only the upper part of the mold;

Fig. 3 is a cross section on the line 3-3 of Fig. 1;

Fig. 4 is a view like Fig. 1, but showing another form of hot to I Fig. 5 is a view like Flg. 2, showing the form of Fig. 4; and

Fig. 6 is a cross section on the line 6-6 of Fig. 4.

Referring particularly to Figs. 1-3, ther is shown an ingot mold 10 of standard construction, on which is placed a hot top consisting generally of a metal frame 11 having an inner lining 12 of refractory material, suc

as fire brick, and having an outer lining 13 of initially plastic refractory material, such as fire clay, or a mixture'of fire clay and ground slag, or other suitable material, The

frame 11 is generally rectangular, as shown in taperin Fig. 3, and has a depending marginal shoulder 14 fitting outside of the upper end of the ingot mold 10, as shown, thus olding the hot top in position. The frame 11 is also provided with an inner marginal shoulder 15 at the bottom thereof for supporting several courses of fire brick together forming the inher lining 12, the bricks in the lower course 16 eachbeing provided with anouter shoulder 17 fitting over the shoulder 15, as shown m Fig. 1. Each of the fire bricks forming the lining 12 has an interlocking engagement with the other fire bricks at its opposite ends, preferably by means of rabbet joints, shown referably, the fire bricks are m Fig. 3. of su stantially uniform thickness, except.

where the shoulder 17 is provided, and form a assageway through which the molten stee is poured the frame 11 tapering toward its upper end for this purpose.

held in position by means of undercut shoul-.

ders provided by horizontal ribs 18, 19 at the top'and bottom of the hot top, by vertical ribs 20 intermediate the corners-of the hot top, and by corner ribs 21. The ribs 20 and 21 are preferably generally dove-tailed in cross section, as shown in Fig. 3. The refractory material 13 is packed into the spaces between the ribs, as clearly shown, and is securely held when hardened. Preferably, but not necessarily, the refracto material 13 may plastered over thev outside surfaces of the ribs 20 and 21, as shown in Figs. 2 and 3. When the hot top is to be removed, it is lifted off the ingot mold by means of lugs 23 secured to the top of the frame 11.

In the form ofFigs. 4, 5 and 6, the hot top frame 30 does not have a taper and in order to gun the opening in the hot to a taper, the fire bricks 31, 32 and 33 have t eir inside faces tapered, as shown in Fig. 4. The fire brlcks have mitered ends, as shown in Fig. 6, and are thus held in position within the frame 30. The frame 30 has a marginal shoulder 34 corresponding to the shoulder 14, and also an inner' fire-bricksup orting shoulder 35 corresponding to the s oulder 15. Dove-tailed ribs 36 intermediate'the corners of the hot top are provided to hold the outer lining of refractory material 37 andv per and lower ribs 38 and 39, undercut u 1i e ribs 18 and 19, assist in holding the outer lining in position.

Both forms of the invention maybe s d for several heats, the inner lining of refractory materlal absorbing sufficient heat from the molten steel to become very hot, thus stricted to the two embodiments herein described and shown.

-What I claim is z-- y 1. A hot top for ingot molds comprising, 5 in combination, a metal-frame having means for supporting inner and outer linings; an inner lining of refractory material and an outer lining of refractory material.

2. A hot top for ingot molds comprising, in combination, a metal frame having means for supportm imier and outer linings; an mner lining o refractory material; an outer lining of mitiall plastic refractory'material; said frame aving undercut shoulders 15 providing spaces into which said initially ,plastic refractory material is packed so that the outer'lining i'sheld upon the frame.

3. A hot top for ingot molds comprising, in combination, a metal frame having means go for supporting inner and outerlinings; an

inner lining ofrefractory material; an outer lining of initiall plastic refractory material; said frame aving spaced vertlcal ribs which are generally dove-tailed in cross-seczu tion and'upper and lower shoulders undercut on the under and upper faces respectively, and the initially lastic refractory material being spread tween the ribs and shoulders and interlocked therewith. a0 4. A hot top for ingotmolds com rising, in combination, a rectangular meta frame having vertical ribs at the corners and intermediate the corners undercut on each side so as to be generally dove-tailed in cross-sec-- 36 tion, and also having upper and-lower shoulders undercut on the under and up er faces respectively; a mass of, initially p astic refractory material spread between the ribs and shoulders and interlocked therewith;

I and aninner lining of refractory material '45 inner 'ng' 0 also su ported by the frame.

5. A ot top for ingot molds comprising, in combination, a metal frame having means for su porting inner and outer linings; an

fire bricks laid in a plurality,- of courses, one above the other, an having tapered inner faces so that there is a passagewaytaperingntoward the upper end, and interlockin wit each other at their ends so as to be eld within the frame; and a lining of refractory material sup orted on the out ide of the metal frame an providing a hea g-retaining layer for the hot top. Y

In testimon that I claim the foregoing 56 as my own, I ave heretoafiixed my signature.

WILLIAM H. HAWS. 

